Light emitting element having a semiconductor main body core with a first end inclined and second end width smaller than the core

Abstract

A light-emitting element extending in one direction includes: a semiconductor core including a main body extending in the one direction, a first end connected to one side of the main body and having an inclined side surface, and a second end connected to an other side of the main body and having a width less than that of the main body; and an insulation film around at least a portion of the outer surface of the semiconductor core, wherein the insulation film includes a first insulation film around the first end of the semiconductor core; and a second insulation film around the second end of the semiconductor core, wherein the diameter of an outer surface of the first insulation film is the same as a diameter of an outer surface of the second insulation film.

What is claimed is: 
     
       1. A light-emitting element extending in one direction, comprising:
 a semiconductor core comprising a main body extending in the one direction, a first end connected to one side of the main body and having an inclined side surface, and a second end connected to an other side of the main body and having a width less than that of the main body; and 
 an insulation film around at least a portion of an outer surface of the semiconductor core, 
 wherein the insulation film comprises a first insulation film around the first end of the semiconductor core and a second insulation film around the second end of the semiconductor core, and 
 a diameter of an outer surface of the first insulation film is the same as a diameter of an outer surface of the second insulation film. 
 
     
     
       2. The light-emitting element of  claim 1 , wherein;
 a thickness of each of the first insulation film and the second insulation film increases as a distance from the main body increases; and 
 a maximum thickness of the first insulation film is greater than a maximum thickness of the second insulation film. 
 
     
     
       3. The light-emitting element of  claim 2 , wherein, in the semiconductor core;
 an outer surface of the main body is exposed; and 
 outer surfaces of the first insulation film, the second insulation film, and the main body are collinear in cross section. 
 
     
     
       4. The light-emitting element of  claim 2 , wherein;
 the insulation film further comprises a third insulation film around an outer surface of the main body of the semiconductor core; and 
 outer surfaces of the first insulation film, the second insulation film, and the third insulation film are collinear in cross section. 
 
     
     
       5. The light-emitting element of  claim 4 , wherein the third insulation film has a constant thickness. 
     
     
       6. The light-emitting element of  claim 2 , wherein the insulation film further comprises inorganic particles. 
     
     
       7. The light-emitting element of  claim 1 , wherein the semiconductor core comprises a first semiconductor layer, an active layer around at least a partial area of the first semiconductor layer, and a second semiconductor layer around the active layer and a partial area of the first semiconductor layer. 
     
     
       8. The light-emitting element of  claim 7 , wherein the first semiconductor layer comprises a first portion extending in the one direction, a second portion located on one side of the first portion, and a third portion located on an other side of the first portion and extending in the one direction,
 wherein the second portion has a shape in which an outer surface thereof is inclined. 
 
     
     
       9. The light-emitting element of  claim 8 , wherein;
 a diameter of the third portion is less than a diameter of the first portion, and 
 an outer surface of the third portion is recessed from an outer surface of the first portion toward a center of the first semiconductor layer. 
 
     
     
       10. The light-emitting element of  claim 8 , wherein the active layer surrounds an outer surface of the first portion. 
     
     
       11. A display device comprising:
 a substrate; 
 a first electrode on the substrate; 
 a second electrode on the substrate and spaced from the first electrode; 
 a first insulation layer between the first electrode and the second electrode and covering at least a portion of each of the first electrode and the second electrode; and 
 a light-emitting element on the first insulation layer between the first electrode and the second electrode and extending in one direction, 
 wherein the light-emitting element comprises: 
 a semiconductor core comprising a main body extending in the one direction, a first end connected to one side of the main body and having an inclined side surface, and a second end connected to an other side of the main body and having a width less than that of the main body; and 
 an insulation film around at least a portion of an outer surface of the semiconductor core, 
 wherein the insulation film comprises a first insulation film partially surrounding the first end of the semiconductor core and a second insulation film partially surrounding the second end of the semiconductor core. 
 
     
     
       12. The display device of  claim 11 , wherein;
 the first insulation film is located such that at least a portion of the first end is exposed; 
 the second insulation film is located such that at least a portion of the second end is exposed; and 
 the display device further comprises a first contact electrode in contact with the exposed first end and the first electrode and a second contact electrode in contact with the exposed second end and the second electrode. 
 
     
     
       13. The display device of  claim 12 , wherein:
 the light-emitting element is located such that at least a portion of the first end of the semiconductor core is on the first electrode and at least a portion of the second end thereof is on the second electrode; and 
 at least a portion of each of the first insulation film and the second insulation film is in direct contact with the first insulation layer. 
 
     
     
       14. The display device of  claim 13 , wherein the first insulation film comprises a first residue located between the first end and the first insulation layer. 
     
     
       15. The display device of  claim 14 , wherein;
 the light-emitting element comprises a first surface in which the first contact electrode is in contact with the first end, and a second surface in which the first contact electrode is in contact with the first residue; and 
 the second surface is not parallel to an upper surface of the substrate. 
 
     
     
       16. The display device of  claim 12 , further comprising a second insulation layer on the light-emitting element,
 wherein a width of the second insulation layer is greater than a length of the main body of the semiconductor core. 
 
     
     
       17. The display device of  claim 16 , wherein the first insulation film further comprises a second residue located between the second insulation layer and the first end. 
     
     
       18. The display device of  claim 17 , wherein the light-emitting element further comprises a third surface in which the first contact electrode is in contact with the second residue,
 wherein the third surface is perpendicular to an upper surface of the substrate. 
 
     
     
       19. The display device of  claim 16 , wherein the second insulation layer further comprises an insulation pattern located between the first end of the semiconductor core and the first electrode. 
     
     
       20. The display device of  claim 19 , wherein the first contact electrode is in contact with an upper surface of the insulation pattern.